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一、CTS—6型探伤仪时基扫描线性不良,如图1所示,起始一段扫描锯齿电压斜率较小,按机械标尺读数,带来较大误差。改进:去掉 C_8 (见图3)。去掉 C_8对(C_9+R_(14))的分流作用后,扫描锯齿电压线性改善,如图2所示。去掉 C_8后,要加大 C_5～C_7,以保持原设计的时间常数。方法:将纵波探头固定在70～100毫米试块上,保留 C_8,观察几个底脉冲反射波,然后去掉 C_8,在C_5(C_6、C_7)两端并以电容(可用电容箱来调整),达到与保留 C_8时看到的底脉冲个数相等,
First, the CTS-6 flaw detector linear sweep time-poor, as shown in Figure 1, the initial scan sawtooth voltage slope is small, according to the mechanical scale reading, bringing greater error. Improvement: Remove C_8 (see Figure 3). After removing the shunt effect of C_8 (C_9 + R_ (14)), the sawtooth voltage is linearly improved as shown in FIG. 2. After removing C_8, to increase C_5 ~ C_7, in order to maintain the original design time constant. Methods: The longitudinal wave probe was fixed on a test block of 70 ~ 100 mm, retaining C_8, observing several bottom pulse reflected waves, then removing C_8 and using capacitors (adjustable by capacitance box) at both ends of C_5 (C_6 and C_7) Reached and reserved C_8 when the number of pulses at the end of the same,